Keyboard



FIG. 1 is a front view of a keyboard showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof;

FIG. 8 is a partially enlarged view of the area “8” in FIG. 1; and,

FIG. 9 is a partially enlarged view of the area “9” in FIG. 7.

The broken lines in the drawings depict portions of the keyboard that form no part of the claimed design. 

CLAIM The ornamental design for a keyboard, as shown and described. 